Short for AW, or attention whore: a person who must have attention and will do anything for it. A-dubs often post updates on social networking sites just to get comments. These are usually updates that try to get you to feel sorry for them. The word "a-dub" can be used as code in front of people who don't know about Urban Dictionary.

"Dude, that chick faked her death on facebook."
"Wow, what an a-dub."

"Hey, there's that a-dub I was talking about. She just can't get enough attention."
"Bro, that's my sister!"
"Oh..."

Also known as 'A-dub' A nickname for the amazing band 'Allstar Weekend' from San Diego, California. They are the best band in the WORLD! Buy their album 'Suddenly Yours' and their new song 'Not your Birthday'
A - Allstar
D - Double
U - U (W)
B - no reason... maybe to make it sound like an actual word